Quick review.
10 − 5 =
10 − 8 =
10 − 3 =
10 − 7 =
10 − 4 =
10 − 9 =
Subtract from 11-20.
12 − 5 =
13 − 6 =
14 − 7 =
15 − 8 =
16 − 9 =
17 − 10 =
Number Talk — Which is larger? Explain WITHOUT calculating.
15 − 7 or 15 − 3
My thinking:
18 − 9 or 17 − 9
My thinking:
Read carefully. Think about what is happening in the situation.
Tom had 15 stickers. He gave 7 to his friend. How many does he have left?
Draw or write your thinking:
Answer:
There were 18 cookies on the plate. Sarah ate 9. How many are left?
Draw or write your thinking:
Answer:
Challenge Problems
1. 20 − 13 =
2. 19 − 12 =
3. Create your own word problem using subtraction from 11-20: